| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1293.84 | USD | 20250922 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1293.44 | USD | 20250920 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1328.59 | USD | 20250920 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1328.59 | USD | 20250919 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1293.44 | USD | 20250919 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1294.23 | USD | 20250918 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1329.39 | USD | 20250918 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1295.28 | USD | 20250916 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1330.48 | USD | 20250916 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 1294.75 | USD | 20250915 |